/*
 * Copyright 2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.yarn.am.assign;

import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.yarn.api.records.ContainerId;

/**
 * Default {@link ContainerAssign} implementation using
 * {@link Object}s as assigned data.
 *
 * @author Janne Valkealahti
 *
 */
public class DefaultContainerAssign implements ContainerAssign<Object> {

	/** container to data map */
	private Map<ContainerId, Object> containerMap = new HashMap<ContainerId, Object>();

	/** data to container map */
	private Map<Object, ContainerId> dataMap = new HashMap<Object, ContainerId>();

	@Override
	public void assign(ContainerId containerId, Object data) {
		containerMap.put(containerId, data);
		dataMap.put(data, containerId);
	}

	@Override
	public Object getAssignedData(ContainerId containerId) {
		return containerMap.get(containerId);
	}

	@Override
	public ContainerId getAssignedContainer(Object data) {
		return dataMap.get(data);
	}

}
